Supply installation for central chassis lubrication



Junk; 14. 1927. 1,632,773

J. BIJUR SUPPLY INSTALLATION FOR CENTRAL CHASSIS LUBRICATION Filed Auz. 2a. 1926 2 Sheets-Sheet 1 (inventor chap/259k June 14, 1921. 32.773

J. BIJUR SUPPLY INSTALLATION FOR QHNTRAL CHASSIS LUBRICA'I'ION Filed Auz. 26. 1926 2 Sheets-Sheet 2 i i 2 "3. J k2?" v Patented June 145 I 1,632,773.. I ATE- PATENT? OFFICE,

- J'osarn' armn, or new Yonx, n. Y,, Ass'IoNoa 'ro AUTO nnsannc'nconronarron, A j I ooaronarrou or DELAWARE.

SUPPLY INSTALLATION FO R CENTRAL CHASS IS LUBRICATION.

I Application filed August 26, 1926. Serial No. 131,640.

This invention relates primarily to lubricant supply installations, from whichyarious bearings derive lubricant through intervening piping or conduits provided with appropriate flow control devices.

The present application discloses an 1mprovement in the reservoir per se, 1n the pump per se and in the combination of reservoir and pump shown in Patent No. 1,451,

861 granted April 17th, 1923, to Edgar J.

Bloom and in, the corresponding elements shown in the related pending application of Edgar J; Bloom, Serial No. 562,090, filed May 18th, 1922.

It is an object of the present invention to provide a pump installation, devoid of complicated mechanism and which may be conveniently operated manually with an effort, varying little with variations in the viscosity of the oil, and which is substantially proof against escape ofoil at parts exposed to the hands or clothing of the operator.

Another object is to provide an installation of the character described, which assures the delivery of only clean oil to the piping system even through the oil originally poured into the reservoir may have foreign particles therein.

Another object is to provide an installation of the type mention'ed, which when employed to transmit through a pipe system normally oil-filled, will inherently and automatically indicate the depletion of oil from the reservoir, without the need for auxiliary gauges or the like for that purpose.

Another object is to provide an installation of the character noted, which affords a secure, self-centering lubricant-tight seal during the intervals between pump opera- .tions which precludes leak, without introducing the high resistance necessary to render a relief valve entirely reliable.

Another object is to provide an installation of the type set forth, which will efl'ectively exclude foreign matter from the oil therein without, however, becoming air bound and which Wlll operate with unlform reliability substantially regardless of the visprior Bloom patent and application referred to, a preferred embodiment of the present invention, includes a unitary assembly of lubricant reservoir and plunger pump, the reservoir in a preferred use for chassis lubricating purposes, being in front of the dashboard, the pump having an operating part accessible from in back of the dashboard, the assembly of reservoir and pump being secured to the dashboard.

For convenience of application and of operation, I prefer to dispose the pump cylinder or casing so that its inlet and its outlet as well as the head or end thereof through which the plunger rod or other ejector protrudes are at level lower than that of the lubricant filling the reservoir. To preclude the possibility of draining the reservoir contents during the intervals between pump operations through the pump outlet or through the cylinder head, I provide closure means on or associated with the plunger rod, preferably a self-accommodating member automatically retained by means of a strong plunger return spring, to-seat at the outlet .from the installation to the pipe line leading from the pump; The effectiveness of the closure is enhanced by the-fact that the seat thereof is at all times wet. with oil tending to drain from the bottom of the res- 'ervoir. The end of the pump piston in its normal position may seal the outlet from the pump to the pipe line or the inlet from the reservoir to thepump, but preferably it simultaneously seals both said inlet and said outlet under the relatively high pressure exerted by the plunger return or pump discharging spring. In seated position, the self-accommodating seat is interposed between the reservoir and the" cylinder head and thereby also prevents draining of part or all of the reservoir contents through said head. 4 i

A feature of the invention in a preferred mode 9f Xe'cution thereof is a filter pad for intercepting-any solid particles from the oil before it reaches the pipe line. In a preferred embodiment, the oil seeps through the filter pad to a drain or settling chamber therebelow, from which the pump derives its charge of clean oil. The drain chamber is vented through one or more pipes opening to the exterior of the reservoir, the vent openings being appropriately guarded, or shielded to prevent clogging thereof by dust,

To ermitrelatively unimpeded flow of the oil. mm the filter pad to the bottom of the drain chamber and yet prevent return of 011 to the reservoir during pump discharge).

check valve is provided-which is 0 en in the charging stroke of the pump an is automatically urged to seated position during pump discharge.

By the use of a manually char ed. spring discharged pump, the charging e ort s not much increased with increase in viscosity of the oil. The stressed spring will exert a pressure upon the oil in the pump, which will be automatically sustained untll the pump has been discharged,.therate of discharge varying, however, in an inverse ratio with the viscosity of the oil.

Were a pump installation of the preferred character, employed without appropriate safeguards, the pump, if of the preferred close-fitting piston type, might in the absence of an available supply of lubricant, forceair into the pipe line durin discharge, and thereby impair the distri ution from the pipe system. Moreover, the pump plunger in its rapid substantially unimpeded spring-urged descent might crush or disintegrate the plunger seating washer. Air injection is precluded according to my invention, by automatically relieving, venting or expelling any air in the range of operation of the pump, said air-relieving venting'means being constructed and arranged to sustain pressure applied thereat through the more viscous lubricant. I prefer to embody the air venting means in the check valve by forming the latter of relatlvely lar e area and with substantial clearance with respect to its seat. By reason of its low viscosity, air would not exert enough lifting force to seat the valve, while the latter would function selectively to seat under the action of oil, by virtue of the viscosity of the oil. Injury to the plunger seating washer is obviated by forming the selfaligning plunger end preferably as a cushioning t-himble, which strikes the plunger seat, a spring in the thimble yielding under the inertia of the heavy plunger therebeyond, the impact of the latter being taken by the plunger 0 rating head striking the end of the cylin er.

While my improved lubricant supply installation may be employed advantageousl in the system disclosed in. the above identified copending Bloom application, or in connection with any of a variety of other piping and flow control installations, it has a preferred application as an element in a system of the general type disclosed in my co-pending application, Serial No. 124,566 filed July 24, 1926.

\Vhile the reservoir and pump are preferably combined in a unitary structure, these elements may be separately mounted -voir.

and connected by a pipe as in the disclosure of my latest copending application referred to in the next paragraph.

The present application is a continuation in part of my copending applications, Serial No. 580,668, filed August 9th, 1922, Serial No. 662,195, filed September 12, 1923 and Serial No 695,740, filed February 28th, 1924.

Those features of the construction herein disclosed by which the parts are associated with the motor vehicle are separately claimed in my divisional application Serial No. 182,362 filed April 9, 1927 and in the division of said latter application, Serial No. 193,090, filed May 21, 1927, claiming the pump draining construction.

The reservoir and the air rejecting structure are claimed in my copending application Serial No. 132,141 filed August 28, 1926,

these parts being claimed herein only in combination with the elements making up the reservoir-pump installation.

In the accompanying drawings in which are shown one or more of various possible embodiments of the several features of my invention,

Fig. 1 is a side view of the complete installation mounted on a dashboard,

Fig. 2 is a top plan view of the installation with part shown in section,

Fig. 3 is a bottom plan view of the reservolr,

Fig. 4 is a transverse sectional view on a larger scale taken on line 44 of Fig. 2,

Fig. 5 is a plan view of the inverted filter sustaining cup and associated parts, and;

Fig. 6 1s a fragmentary view of an alternative form of check valve.

The drawings show a reservoir comprising a cylindrical sheet metal wall 10 into the upper end of which is telescopcd a stamped metal cover 11 having a machined neck 12 friction fitted and soldered thereinto. A filter disk 13 preferably of wool felt is pcriphcrally clamped in position at the lower end of the cylinder, preferably between a stamped frame collar 14 thereabove and a cast reservoir bottom 15 therebelow. For assembly, the bottom is first soldered in place, the filter disk is then laid thereon to rest upon upstanding ledge 16 of the bottom. The stamped frame collar 14 and the lock ring 17 are then forced into place, the lock ring snapping into groove 18 of the reser- The frame collar 14 has an outstanding inner periphery 19 in registry with ledge 16. Thus, in the assembly, the periphery of the filter disk is securely clamped in place and substantially 'constricted where clamped, as shown. The soldering operation is thus performed before the filter disk is applied and the latter is not subjected to injury from the heat of soldering. To dispense with the need for offsets in the filter cured at a diametrical web edge, the clamping frame and the lock ring,

10 shown in Fig. 2.

To relieve the filter of the weight of oil thereabove and of the suction effect due to the pump hereinafter described, a sheet metal backing cup 20 is provided, the rim of which rests on corresponding-spaced lugs 21 formed therebelow, integral with the bottom 15. A pair of pipes 22 serve to vent the oil chamber 23 below the filter 13. These pipes extend through the filter and are spun over at their lower ends at 24 for attachment with respect to backing cup 20. To preventleak of unfiltered oil along the vent pipes, ,flanged washers 25 and 26 about the vent pipes are pressed at their inturned outer rims into the opposite faces of the pad, a shoulder 27 on the vent pipe pressing the upper washer downward, the backing cup reacting to hold the lower washer upward.

The flangedwashers havehubs 25 and 26 respectively which abut as shown, in the as- .sembly, and thereby limit the constriction of the filterpad thereat. The backing cup 20 presents an open end to expose a maximum area of filter, the vent pipes being se- To facilitate escape of air from below the periphery of the felt to the vent pipes, the lateral wall of the backing cup 20 has perforations 2O at the upper rim thereof.

Pipes 22 at'their upper ends extend into, and are sustained at bores 28 in the neck, the inner diameter of which is enlarged at its upper end at 30 so that the bores 28 break through for communication with the interior of the neck. The backing cup 20 performs the additional function of sustaining the pressure transmitted through vent pipes 22 in applying the neck ,12, thereby protecting the filter from rupture, were such pressure applied thereto. An oblique bore 31 extends downward from one of bores 28 through the neck and terminates at the und'ercut part 32 of thread 33 on the closure cap 34 of the reservoir, so that dirt is substantially excluded therefrom. This bore serves to vent the interior of the reservoir and through the vent pipes 22, the filter chamber 23. The rim 36 of a mesh wire or cloth strainer cup 37 is suspended from the neck and secured in place by a split lock ring lodged in.- a corresponding groove within the neck.

The reservoir bottom or drain chamber has an integral axial frustro-conical air separating or settling cup 38 extending downward therefrom. check valve V is mounted near the upper end of the cup and comprises a cage 39 threaded into the upper and of the cavity-and providing a valve seat 40 with an efl'ective seating area of inch in diameter at its lower face. The Valve comprises a solid metal button 42 with a beveled rim'. It' is normally suspended below the seatby a sheet metal valve hanger so as to seat by a lift of about A; inch. .The hanger comprises a disk 43 secured to the valve button by rivet 44 and having upstanding fingers 45 turned outward at 45 to rest on top of the valve cage. On top of the valve hanger is provided a deflection'plate or cup 46 secured in place by the'same rivet 44 that connects the valve to its hanger, said deflection platehaving an outwardly extending flange 47 curved over the hanger and valve for a purpose which will be apparent in the description of the operation below. The assembly of valve button, hanger and deflection plate has a weight of 1 ounces. Valves of different dimensions and weight and hangers of different length may be used but for absolute reliability in the operation which will be described below, some definite relation between the dimensions and the weight must be preserved.

The specific construction of valve set forthhas been found thoroughly reliable for Widely different viscosities'of the oil.

The preferred pump comprises a cylinder which may be obliquely arranged, as shown,

and constitutes a length of pipe 50 threaded it its lower end into a socket 51 in the cor- X'GSDOIKllHQly thickened part 52 of the wall of cup 38. The pump draws its charge from cup 38 through a port 53 aligned therewith and of relatively large diameter. The pump ejects by return flow into the cup, until it has effected closure of the valve V which then sustains the pump pressure, so that the discharge proceeds thereafter through a smaller port 54 in said thickened part 52 to the head of the pipe line, which is connected to the cup by a nipple 55. The pump cylinder is closed at its head by a press-fitted bushing 56 through which extends the piston rod 57. The outer end of the piston rod has an operating knob 58 and the lower end has atlixed thereon. the usual cupped leathers 59. A coil spring 60 encircles the piston rod but is out of contact with the inner surface of the cylinder and reacts at its upper end against bushing 56 and at its lower against washer 61, In the bottom of socket 51 is provided a seating disk 62 of fibrous gasket material which is held in position by lock wire 63. The piston is normally urged by the spring 60 against disk 62 to close the upper end of the pipe line and so prevent system. The disk 62 has ports registering with ports 53 and 54 respectively and is posiagainst shoulder 57 on the piston rod.

tioned by a tube 62 extending into the latter 'ort.

p In order to provide a self-aligning seat for the pump piston and to protect disk 62 from damage and consequent leak due to the high impact thereagainst,'should the pump handle be drawn outward and let go in the absence of sufiicient oil, I have provided a spring cushioning construction. This comprises a seating thimble 64 having an edge 65 turned inward over the flange 6601 a sleeve 67 threaded and staked upon the reduced extension 68 of the piston rod and thereby serving to hold the cupped leathers coil spring 69 within the thimble normally holds it in outer position, as shown. If the pump piston is drawn outward at a time when the reservoir is substantially depleted ofoil, and then let go, substantially only the weight of the light thimble (ll will be projected against. disk 62 by the powerful expansion of a spring 60, the smallerspring 69 threupon yielding as the sleeve 67 telescopes into the thimble. and allowing the nut 70 to strike the collar 56 and take the blow, so that the impact against disk 62 due to the relatively great momentum of the piston rod is relieved. by the cupped leathers 59, the thimble 64 which normally extends into the extremity of the cylinder 50. need not fit snugly. Preferably. it should have a tit sufficient y loose therein, to avoid being clamped or eized due to the compression of said cylinder, when screwed into mounted position.

In the preferred embodiment, applied to a motor vehicle. the reservoir and pump assembly is mounted as indicated at Figs. 1 and 2 with the reservoir in front of the dash exposed to the heat of the engine and the pump handle extending in back of the dash for convenient operation from the driver's seat. For installation the reservoir and pump are pro-assembled, except that knob 58 is left oli'. The outer end of pump cylinder is inserted through a corresponding aperture 75 in the dashboard from the front thereof and the reservoir is thus positioned. The cast bottom 15 has integral flat lugs 15' thus brought into contact with the front of the dashboard, to which the installation is then secured by bolts and nuts 91 through the dashboard and the lugs. The upper part of the reservoir wall is provided with a short strap 92, soldered thereto, the end lugs 93 of which are clamped against the dashboard by bolts and nuts 94. The bolts 94 also serve to secure in position the base of a generally triangular bracket 74 embracing at its opposite end 74, the outer part of pump cylinder 50 and thereby steadying the same. The assembly is then completed by applying the knob 58. which latter was initially left off because it is of The suction being exerted diameter too large to be passed through aperture 75.

In order to dispense with the use of packing at the handle end of the pump which packing might render the manual operation hard and introduce irregular friction on the down or discharge stroke, I provide means to allow any oil which may have passed during a stroke, above the cupped leathers 59 to escape through one or more transverse apertures 76 in the cylinder, immediately beyond the outermost position of the piston. The apertures 76 being directly over the floor of the vehicle, means is provided to direct any surplus oil to the engine side of the dash, so oil will not drip to the floor, nor even soil the part of the pump exposed to the driver. For this purpose, a cylindrical drain sleeve 77 of somewhat larger diameter than the pump cylinder is telescopcd thereovcr, and has an inturned upper edge 78 in snug engagement with the cylinder above the opening 76 and short pressed-in ribs 79 at the lower end affording passages through which will escape, any oil ejected from aperture 76. To prevent dripping of any such escaped oil upon the nipple or the pipe line, and thereby creating a mistaken impression that there is a leak, the part of the casting bottom 15 directly below the lower end of drip sleeve 77 is bifurcated at 80, so that the drippings will fall from the apices of the bifurcation and at opposite sides of the pipe (not shown) connected to nipple 55.

The oil reservoir being properly installed and charged with lubricant, the manual operation include the single step of withdrawing knob 58 of the pump to the end of its stroke and letting go. The length of stroke is preferably determined by the closing up of the spring turns. Thereafter lubricant is admitted to the bearings without any further attention on the part of the operator.

In the manual or charge stroke of the plunger. lubricant is admitted to the pump as rapidly as the piston is drawn outward against the resistance of spring and this by reason of the large diameter and corre spondingly low resistance of valve seat 40 and of port 53. By reason of the large diameter and substantial drop of valve V and the conformation of deflection plate 47, oil is drawn during suction laterally upward and inward from about the periphery of the deflection plate, and outward about the periphery of the valve. There is thus avoided the cavitation and possible drawing in of air from above a substantial depth of lubricant, which might be incurred with the use of a valve affording but a small aperture through which suction is supplied to the oil directly thereabove. The settling chamber 23 from which the pump draws its charge substantially at the outset. The pump hav-.

in no friction packing and the spring not rubbing against the cylinder wall, the pump is relatively etficient and the'maximum pull required for operation is about 3 0 pounds.

After the charging operation is thus completed, and the operating handle let go, the

expansion of the spring will force the piston inward upon the body of oil confined in the cylinders. By reason of the substantial resistance or viscosity of the oil, the valve V will be forced upward against its seat in the reservoir, acting as a check' valve to prevent return of lubricant to the reservoir and the lubricant is thus forced out of the pump cylinder through the length of the pipe system (not shown) and in parallel through the controlling outlets, the/discharge continuing until the end of thimble 64 seats in the POSI- tion shown in Fig. 4. g

The spring is preferably under substantial compression, even in its most extended position in the pump, whereby the manual effort required in my construction to overcome or compress it, is not much greater at the end than at the beginning of the charging stroke, so that the expansive or expulsive force is not much less at the end than at the beginning of the dischargestroke and so that a substantial residual expansive force of the spring is available to urge the thimble to seating position. The yielding action of buffer spring 69 causes the thimble to readily adapt itself to the yielding seating washer 62. The reservoir and pump are thus effectively sealed to prevent leak of the contents thereof, through an open or broken pipe line and to prevent escape of the pipe contents through any one leaky fitting or joint thereof. While spring 60 may have any of a wide variety of specifications for my purpose, I have employed a coil spring of unstressed length of from 26 to 28 inches, compressed to 12% inches in its most expanded state, within the pump cylinder and permitting of a 2 inch stroke to close up to a length of 10 inches. 7

It will be seen that the rugged. casting 15, not only sustains the weight of the various parts, but takes the pulling and pushing thrust of the pump. The reservoir wall, accordingly, can be and preferably is of light sheet metal. as shown.

There being ordinarily a substantial interval between successive operations of the pump, operation once 'a day being usual, it

follows that even when the lubricant in thereservoir is low, sufiicient will have seeped through the filter disk 13 in the interval between operations 'to provide a filtered sup;

ply therebelow from which the pump is charged. The pump will, therefore, operate eifectively almost until the reservoiris completely drained of lubricant. The large filter 13 intercepts any solid particles carried with the oil, and is thereby helpful to prevent clogging or other derangement of the control devices (not shown),- in the nei hborhood of the bearings, bythe accumu ation thereat of such foreign matter.

During the intervals between pump operations, the seating end 64 is pressed against disk 62, thereby effecting not only a secure mechanical seal thereat, but since seatingmember 64 is at low level relative to the reservoir contents, there is effected, in addition, an oil seal, the softdisk 62 being at all times wet with oil at the bottom of the reservoir. In the embodiment shown, the pump'plungcr end when seated against disk 62 not only closes the outlet from the pump but the inlet thereto as well. Since the seated pump plunger end is interposed between the reservoir and the cylinder head 56, it prevents draining of part of the reservoir contents through said head.

By pulling the pump knob through a range less than its full stroke, a reduced charge of oil may be supplied to each bearing, and by pressing or leaning on the plunger, an increased discharge pressure may be generated. Great increase of viscosity of the lubricant in winter does not entail any corresponding increase in the manual efiort to charge the pump; only the absolute rate of discharge would be affected.

My lubricant supply installation has a selective action to e ect only oil through the nipple 55, the pump discharge in the absence of an available supply of oil causing the rejection of air, back into the reservoir 4 rather than to force it through said nipple into the pipe line. This property is of importance when the installation is employed with a pipe system. the reliability of the distribution of which depends on maintaining the pipe line from the control outlets completely filed with oil. Air under compression in the pipe line might, moreover, be objectionable because any subsequent expansion thereof into the pump cylinder as the plunger is being Withdrawn, might interfere with the sucking action of the pump.

With the pipe line intact and completely filled with oil, the rapid descent of the pump plunger after operation, reliably indicates the absence of Oil in the reservoir. With air partly or wholly filling the pipe line, such ump to the rapid descent would occur even with a filled reservoir and this act-ion'would no longer give a reliable signal of the need for 011.

When the oil in the reservo1r of m construction is down to a level below va ve V, the pump charge being of volume less than that of cup 38, the plunger will draw on l oil from said cup and in its discharge wil return the oil to the cup. The air entering the cup from the reservo1r as the pump is being charged, would, by reason of-lts. o w viscosity, exert insufficient l fting force in its return to the empty reservolr during pump discharge, to raise or seat the valve V. Thus, the cup 38 will always have a charge of oil therein greater than the charge of the pump, regardless how often the pump is operated with little or no 011 1n the reservoir. The pumpleathers being at low level relative to cup 38, the rmmp is automatically and reliably primed. In general, the pipe line supplied from the pump 1s much more highly resistant to fiow than the settling cup 38, so that no check valve is required at the nipple 55 to prevent suction on the pipe line in charging the pump. althou h such valve may be employed, if desired, wlthln the scope of my invention, as defined 1n the appended claims.

When the level of the Oil in the reservoir drops below the valve V, if a jet from the pump could im inge on valve V, 1t would be likely to force it upward against its seat and thereby trap air. This is obviated by d1- recting the port 53, as shown, laterally at an angle to the valve V. so that the jet will not impinge thereon, the 011 bemg ejected from the pump to the settling cup 38, wherein the velocity of the jet will be dlsslpated by forming a vortex allowing the level of the oil to rise without much splashing, so

that the air remains above the oil and passes the open valve before the oil level comes up to seat it, the beveled edge of valve 42 guiding the air in its escape about the valve rim.

\Vere the gap between the valve and seat to be sealed by a resistant film of oil, it would be possible with a nearly empty reservoir for the pump in its discharge to force air from cup 38 into the pipe line rather than to cause the air to escape from between the valve and its seat. In the construction shown, the valve normallv extends below its seat for a distance greater than would be spanned by a resistant film of even highly viscous oil. YVhile heavy oil would by virtue of its high viscosity reliably seat such valve without further safeguards, a lighter grade of oil might in such arrangement pass back to the reservoir in pump discharge without lifting the valve. The outstanding flange 47 of the deflection plate 46 is directly in the path of oil returning to the reservoir, and acts by turning back and outwardly, oil impinging thereon, whereby the lifting impulse upon the valve is materially assisted during pump discharge and prompt seating is assured even when the oil 1s relatively light. The sustained pressure of the oil thereafter maintains the valve a ainst its seat until the pump has complete its discharge, whereupon the valve will again drop by virtue of its weight, to the position shown in the drawings.

In Fig. 6 I have shown a modified form of air rejecting check valve devoid of the deflection plate 46 shown 1n Fi 4:.and suspended but little below the val seat which will preclude the formation of a seaiing oil film, when a lighter grade of oil is employed. The valve shown comprises a sheet metal disk 81 faced with a seating disk 82 of oiltreated fibre board thereover and backed by a conical button 83 therebelow. The valve is normally suspended in 0 en position below the seat 40 by a valve ranger comprising a sheet metal disk 84 encircled by the seating area of the facing disk and having a plurality of upstanding fingers 85 bent outward, to form stop flanges 86 normally resting on top of the cage 39', as shown. Rivet 87 centrally through the disk 81, its facing 82, the button 83 and the hanger 84 secures said parts together in a unitary structure.

The periphery of the valve extending as it does laterally well beyond the valve port hinders cavitation, for reasons full described in the foregoing, from WhlCl the air-rejection operation of valve 8183 will also be apparent. The conical button 83 Fig. 6 serves as a guide, to direct any air upward about the rim of the valve through the seat.

I claim:

1. Apparatus of the character described comprising a reservoir, a pressure pump supplied therefrom, said pump having an ejector, said ejector having a part self-accommodating with respect to the pump outlet and adapted to close said outlet during the intervals between pump operations, one of the coacting elements of said closed outlet being of soft material, said reservoir connected with respect to said pump, to normally maintain said soft element wet with oil, and an ejector return spring to exert pressure against said soft element while maintaining the pump outlet closed.

2. Apparatus of the character described, comprising a pump cylinder having an outlet head end, a plunger rod therefor, an outlet sealing element at one end thereof, a coil spring encircling said rod and urging said sealing element against said outlet head end, one of said coacting elements of said sealed outlet being of soft material, a reservoir having an outlet in draining communication with said pum cylinder to wet the parts of said sealed out et, said coil spring normally maintaining the soft wet element under compression. I I v Y 3. A supply installation for a chassis lubricating system including a pump and reservoir assembly, w level higher than the parts to be supplied therefrom, sa'id assembly including a laterally extending pump cylinder and a reser-' voir connected thereto in lubricant-tight relation therewith, said cylinder having a head, apiston rod projecting through said head, the contents of the filled reservoir ex-- tendin at level higher than said head and than t e pump outlet, a spring encircling said rod and urging the same toward one end of its stroke, said rod having a selfaccommodating seating element thereon, normally retained in pump outlet closing position, said seating e position being interposed between the reservoir and the pump cylinder head, thereby preventing draining. of the reservo r contents through said head.

4. A supply installation for a chassis lubricating system including a pump and res ervoir assembly, said reservoir having 'a check valve therein, a chamber for said check valve, said chamber affording an exterior mount for'thepump, an inlet port through said mount for communication between the pump and the chamber, said pump having an outlet port inaddition to said inlet port, whereby in operation pressure of the pump will be exerted against and sus- "tained by the inner wall of said chamber and the closed valve therein, while ejection occurs through the outlet port.

5. A supply installation for a chassis lubricating system including a pump and reservoir assembly, said reservoir having a check valve therein, a chamber for said check valve, said chamber affording an exterior mount for the pump, an inlet port throughsaid mount for con'nnunication between the'chamber and the pump, an outlet ort through said mount in addition to said inlet port, said pump having anejector, and means normally retaining said ejector against the end of said'mount to close both said inlet and said outlet port.

6. A supply installation for a chassis 1 lubricating system including a pump and reservoir assembly, said reservoir having a check valve therein, a chamber for said check valve, said chamber affording an exterior mount for the pump, an inlet port from said reservoir to said pump through said mount, saidpum'p including a cylinder having a head, a plunger rod extending through.

said head, and an outlet port, said inlet port, said head and said outlet port being below the level of lubricant in said reservoir, a selfaccommodating sealing member carried by said rod and a spring normally urging said rod to close said inlet and said outlet ports,

adapted to be mounted at ement in said latter said reservoir, ,a piston structure in said cyl- I inder, a seat limiting the inward movement a of said structure to cause it normally to close both said inlet and said outlet, one of the coacting seating elements being ofyielding character, manual operatingmeans for said pump laterally of said reservoir, and a check valve within said installation above said outlet automatically urged against its seat during pump discharge.

A supply installation for a chassis lu bricating system including a reservoir and pump assembly, the pump element comprising a cylinder having an inlet from said reservoir, below the level of lubricant in the latter and having an outlet leading to the parts to be lubricated, and a piston rod in said cylinder having a yielding self-aligning structure at, its end normally seated to close both said inlet and said outlet, and a check valve within said installation above said outlet, gravity held in open position, and automatically raised to its seat during pump discharge. I

9. A supply installation for a lubricating system including a reservoir, a pump cylinder structure having an inlet adjacent to an.

ing together said reservoir and said pump structure to combine them into a unitary apparatus with the pump cylinder exteriorly ot' the reservoir, and toefiect a substantially lubricant-tight connection for flow of lubricant out of the reservoir into the pump cylinder structure, said apparatus including a pump plunger rod, and a member mechanically associated with said rod and having a flat end for coaction with said seat to shut oil'vthe exit of lubricant from the installation, one of said coacting seating parts being of soft material, and a spring encircling said rod and maintaining said fiat endv pressed against said seat.

10. A supply installation for a lubricating system, including a reservoir, a pump cylindcr structurehaving an inlet adjacent to an outlet opening of said reservoir, means near said inlet mechanically attaching together the reservoir into-the pump cylinder structure, said apparatus including a pump plunger rod to eject lubricant from the 1nstallation during the inward stroke of said rod, a check valve above the pump inlet closed in pump discharge to revent return flow to the-storage chamber of the reservo r, and a yielding structure at the end ofsaid rod normally seated to shut off the exit of lubricant from the installation.

11. A supply installation for a lubricating system including a reservoir, a pump cylinder, means effecting a lubricant-tight connection for the outlet of said reservoir to the inlet of said cylinder, said pump having a plunger rod an associated yielding end structure, a spring encircling said rod and normally retaining said end structure against the outlet from said installation to prevent escape of lubricant therefrom, and a check valve above the pump inlet normally below its seat, and closed in pump discharge to prevent return fiow to the storage chamber of the reservoir.

12. A supply installation for a lubricating system including a reservoir, a pump cylinder structure having an inlet adjacent to an outlet opening of said reservoir, means near said inlet mechanically attaching together said reservoir and said pump structure to combine them into a unitary apparatus with the pump cylinder exteriorly of the reservoir, and to effect a substantially lubricanttight connection for flow of lubricant out of the reservoir into the pump cylinder structure, said apparatus including a pump plunger rod, a tight fittmgp1ston on said rod, a self-aligning extension on said rod beyond said piston adapted to close the inlet to said pump, and means to normally retain said extension in closed position.

13. A supply installation for a chassis lubricating system comprising a reservoir cylinder having a vertical axis. a pump cylinder threaded into the construction of the reservoir near the lower end thereof and extending outwardly therefrom, a check valve in said reservoir above the lower end of said cylinder normally urged downward from its seat, said pump cylinder having a piston rod provided with a closure member at the inner end thereof, said reservoir having seating means provided with a port through which the pump derives its charge from the reservoir, and means normally retaining said closuremember against said seating means to close said port.

14. A supply installation for a chassis lubricating system provided with an outlet near its lower end. and including a reservoir, apump cylinder mounted at its inner end within a bored part of said reservoir, a reciprocating operating member within said cylinder having an end structure to close said Outlet, in order to prevent exit from the installation, a spring associated with said operating member to normally urge said end structure to outlet closing position, and a check valve near the lower end of said reservoir above said outlet normally below its seat and adapted to be elevated by the discharge action of the pump to prevent return fiow into the reservoir.

15. A supply installation for a chassis lubricating system including a reservoir, a pump cylinder extending at an angle to said reservoir, threaded means attaching the lower end of said reservoir with respect to said pump cylinder to form a unitary assembly, an inlet port from the lower end of said reservoir into said pump cylinder, an outlet port from said cylinder through which lubricant passes out of the installation, a plunger rod in said pump cylinder, a circular member carried by the inner end of said rod and of substantially the diameter of the bore of said cylinder, and a spring encircling said rod and normally urging said circular member against the end of said pump cylinder to close the exit port and thereby prevent draining of the reservoir and of the pump.

16. A supply installation for a chassis lubricating system including a lubricant reservoir, a pump cylinder threaded into a corresponding socket in said reservoir and near the lower end thereof, a port from said reservoir into the end of said socket for admis' sion of lubricant to the pump cylinder, a port through the end of said socket for exit of lubricant from said pump, a plunger rod in said cylinder, a disk carried by the inner end of said rod and a spring normally urging said disk into contact with the end of the socket to prevent flow of lubricant both through said inlet and through said outlet )ort. 1 17. A supply installation for a chassis lubricating system comprising the combination of a reservoir, a pump associated therewith, said pump having a cylinder, a plunger rod in said cylinder, a seat at the inner end of said cylinder, a rigid part carried by the inner end of said rod and coacting with said seat, and a resilient connection between said rod and said rigid part to ease th s impact of contact of said part with said seat and to cause said part to be selfaccommodating with respect to said seat.

18. A supply installation for a central lubricating system comprising a reservoir, a pump cylinder associated therewith having an outlet through the inner end thereof, a piston rod accessible from the outer end of said cylinder, a seating disk movable with the inner end of said piston rod, means antomatically urging said disk to close said outlet, and cushioning means interposed between said seating disk and said piston rod.

19.- A supply installation for a chassis lubricating system including a reservoir, a

end of said cylinder, a thimble member car-.

ried by the extreme inner end of said plunger rod beyond said piston and a buffer spring enclosed in said thimble. 21. A supply installation for a chassis lubricating system including a reservoir and pump assembly, the pump element compr1sing a cylinder fitted at its base into a socket in said reservoir, a tight fitting suction piston in said cylinder and an extension piece on said plunger normally extending loosely in the fitted part of the cylinder, bottoming in said socket, and maintaining the piston beyond said fitted cylinder part, whereby seizure of the piston at the fitted cylinder art due to deformation thereof is avoided. 22. A supply installation for chassis lubrieating system, including a pump cylinder, a supporting structure including a socket 1nto which the inner end of said cylinder is threaded, said socket affording an outlet from said cylinder, a yielding impact washer at the inner end of said socket, a plunger rod in said cylinder, a piston cup structure on said plunger rod, a spring coiled about sa d plunger rod and urging the sametoward sa d impact washer, a thimble having a telescopic fit on the extremity of said rod beyond said piston cup, and a spring coiled within said thimble, said thimble fitting looselyv in the extremity of said cylinder and of height such as to maintain said piston beyond said socket. j 23. A supply installation of the character described including a reservoir, an associated pump, a port through which the pump derives its charge from the reservoir, an

outlet through which the discharge of the pump is delivered from the installation, said pump including an ejector having a part mechanically associated therewith, shutting off communication to the outlet, to prevent draining of lubricant from the installation during the intervals between pump operations, and a closure devlce for said port responding automatically and selectively a? the operation of the pump to prevent the trapping or compression of any air below the valve during pump discharge; 24. A supply installation for a chassis lubricating system including a reservoir and pump assembly, the pump element comprising a cylinder and a piston in said cylinder having structureat its end actuated by the piston to close the lubricant exit. from said installation, a coil spring normally retaining sa1d piston in exit closing position, said installation including a check valve normally open and urged to its seat by the discharge of lubricant from the pump, said valve being constructed and arranged to remain in open positlon under the influence of a froth of oil and air advanced in pump discharge.

25, A supply installation for a chassis lubricating system including a pump and reservoir assembly, a port through which the pump derives its charge from the reservoir,- the pump element comprising a cylinder and a piston in said cylinder having structure at its end actuated by the piston to close the lubricant exit from said installation, said exit being at level lower than said port, a C011 spring for discharging said pum and normally retaining said piston in exit-c osing position and a closure device for said port responding automatically and selectively to the operation of the pump to prevent the trapping or compression of any air therebelow during pump discharge.

26. In apparatus of the character described, the combination of a reservoir having a filling opening, a pump deriving its charge through an outlet near the lower part of said reservoir, a check valve closed in the discharge. stroke. of the pump to prevent return flow to the reservoir, sa1d apparatus including a dense filter pad fixed therein at .the lower part thereof and across the path of flow from the reservoir body to the pump. whereby the reservoir may be readily charged through the filling opening without obstruction from said filter pad and means venting the chamber below said filter pad to the external atmosphere.

27. In apparatus of the character described the combination of a reservoir having a filling neck, a strainer mounted therebelow, a pump connected to the lower part of said reservoir and drawing .its charge therefrom, a check valve above the reservoir outlet, normally opened by gravity. and closed in the discharge stroke of the pump to prevent return flow to the reservoir, said apparatus including a dense and vented filter pad peripherally clamped therein near the lower part thereof.

28. In apparatus of the character described, the combination of a reservoir, a

scribed, the combination of a reservoir, a

pump in communication with said reservoir,

said pump having a tight piston, a chamber through which said pmnp discharges, a device in said chamber responding to oil flowing thereagainst during pump discharge and by virtue of the viscosity of the oil, to block return flow from the pump to the reservoir, in order to sustain pressure for propulsion from out of the apparatus, said chamber of volume no less than that of the pump charge, said device operating selectively to afford ready escape for any air otherwise propelled by the pump.

30. In apparatus of the character described, the combination of a reservoir, a spring discharged pump supplied therefrom having a handle extending laterally for convenient operation, said apparatus having a valve, a cage therefor, in open communication with the reservoir contents during the charging stroke and with the pump during the discharge stroke, said valve normally displaced from its seat and having its periphery spaced from the wall of the cage by gaps so large as to avoid the formation of a flow resistant film of lubricant, and as to atford a ready path of admission to the cage,

as well as a free path of escape for any air propelled by the pump during the spring discharge stroke thereof, said valve being conformed relative to the cage to be entrained to its seat by virtue of the viscosity of lubricant propelled in pump discharge.

31. In apparatus of the character described, the combination of a reservoir, a spring discharged pump supplied therefrom having a close litting operatingmember,said apparatus including a chamber into which the pump dischargeis propelled on its way out of the apparatus, said chamber serving when the reservoir is depleted, to dissipate the energy of a discharge jet from the pump and thereby to permit separation of any air, and means venting said chamber, but sustaining pressure transmitted through lubricant.

32. A supply installation for a chassis lubricating system including a reservoir and a pump, said reservoir having a drain cup, a check valve at the upper part of said drain cup retained normally in open position below its seat, said pump connected to draw its charge through a suction port from said drain cup and to discharge into said drain cup by reverse flow through said suction port, said suction port being directed away from said check valve whereby in the discharge action of the pump, the kinetic energy of a jet will be largely dissipated within said drain cup below said valve.

33. In apparatus of the character described, the combination of a reservoir having a normally open valve near its lower end, a frustro-conical chamber below said valve,

a spring discharged pump connected to said chamber through a port directed away from said valve, whereby a direct jet from said pump against said valve is avoided, said valve being of relatively large area and responding to the flow of oil thereagainst by virtue of the viscosity thereof, to be seated in pump discharge and to remain open during the flow of air thercagainst.

34. In apparatus of the character described, a cylindrical wall, a bottom therefor having a frustro-conical chamber protruding thercbclow, a valve cage fixed in the upper end of said chamber, a valve suspended from said cage in normally open position and a plunger pump connected to draw its charge from said chamber and to exert pressure in discharge against the walls of said chamber.

35. A supply installation for a chassis lubricating system including a reservoir having a sheet metal wall and a bottom structure, a check valve 'cage in said bottom structure, a pump cylinder threaded at its inner end into said bottom structure at a point below said valve and discharging through said bottom structure, said valve comprising a disk of relatively large area substantially entirely exposed to the flow of oil. and adapted to be raised to its seat while oil is discharged from the pump, but to remain below its seat upon propulsion of air by said pump.

36. A lubricant supply installation comprising a reservoir, a pump, a drain chamher at the bottom of said reservoir from which the pump draws its charge a check valve at the upper part of said drain chamber normally open and sealed by the low of lubricant thereagainst by virtue of viscosity thereof, but remaining open under the flow of air thcreagainst, the lubricant containing volume intervening between said valve and the inlet to said pump being at least equal to the charge of said pump, whereby oil filling the drain chamber will be drawn into the pump during the suction stroke thereof and will return to said drain chamber without ejection from the installation, if the reservoir have little or no oil above the drain chamber.

37. In apparatus of the character described, the combination of a reservoir, a pump in communication with said reservoir, the pump having a tight suction piston, said apparatus including a device responding to flow of a viscous medium to block return flow from the pump, in order to sustain pressure for propulsion from out of the apparatus said device operating selectively to vent any air otherwise compressed by the pump, and a filter pad of large area associated with the reservoir to intercept any solid particles from the liquid medium, said pad being near the lower end of said reservoir and beyond the course of flow between the pump and selective device. 38. A supply installat on for a chassis lubricating system including a reservoir, a pump connected to derive ltS charge from the lower art of said reservoir, said pump having a tight fitting suction piston, a check valve associated with the pump normally spaced below its seat and urged thereagainst during pump discharge to prevent return flow, and a deflection member extending transversely abovesaid valve to cause the oil to be admitted by lateral flow past the valve seat in the suctlon stroke, thereby hindering cavitation.

39. A supply installation for a chassis lubricating system including a reservoir, :1

ump connected to draw its charge from the ower part of said reservoir, sald pump having a tight fitting suction piston, a check valve associated with said pump piston and having an annular seat, said valve normally sustained by gravity below said seat and a deflection member extending above and across the valve seat and serving to prevent direct downward suction in the charge stroke thereby hindering cavitation.

40. In a lubricant projecting pump, a length of. pipe constituting a cylinder, a base secured to one end thereof and having an outlet port therethrough, a piston in said cylinder having a self-aligning extension for sealing the exit of said pump when in discharged position, a stem secured to said iston and having a handle at itsouter end beyond the pipe cylinder, and a helical spring about said stem having a multiplicity of convoluti-ons out of engagement with thecylinder wall, stressed in discharged state to less than one-half its unstressed length, and urging said piston extension to seat against said base and close saidport, one of said piston extension and seat having a surface of soft material maintained compressed by said spring.

41. A supply installation for a chassis lubricating system, said installation including a reservoir having a drain cup, a pump drawing its charge from said drain cup, a

check valve above the pump connection normally open by gravity to permit free fiow of lubricant to the drain cup, said valve of relatively large diameter and normally at a substantial distance below its seat, whereby in pum suction, -oil will be drawn in by lateral ow past the valve seat, so that cavitation of the oil and drawing in of air from above the level of oil in the reservoir will be hindered. 1

42. A supply installation for a central lubricating s stem comprising a reservoir, a

pump cylm er associated therewith having an outlet through the inner end thereof, a

piston rod accessible from the outer end of said cylinder, aseating disk movable with the inner end of said piston rod, cushioning means interposed between said seating disk and said piston rod and permitting of substantial advance of the piston rod relative to the disk, the cylinder having a head taking the impact stroke of the piston rod.

43. A supply installation of the character described including a reservoir and pump assembly having a discharge outlet, a port through which the pump derives its charge fromthe reservoir, said installation having a check valve open in the charging stroke of the pump to permit drawing the pump charge and automatically closed to sustain the discharge pressure of the pump, said pump including a cylinder, a piston ti htly fitting therein, manual means for with rawing said piston, spring means for automatically discharging the pump, said piston including an end structure normally retained by said spring to seal said outlet and prevent drainage from the "installation during the intervals between pump operations.

44. A supply installation for a. lubricating system including a reservoir and pump assembly having an outlet for connection with the parts to be lubricated, the pump element comprising a cylinder having an inlet from said reservoir, a tight fitting piston in said cylinder, operating means to withdraw said piston in a pump charging stroke, said piston including a part normally closing said outlet/to prevent draining of lubricant therethrough in the intervals between pump operations, said installation including a check vvalve subjected to seating pressure during pump discharge, for preventing return flow of lubricant, said valve constructed and arranged to remain unseated to permit propulsion of air thereby during pump discharge, said valve being disposed at a part of the installation affording a settling chamber therebelow at the top of which any air will separate for esca e past the open valve.

45. A supply instal ation for a lubricating system including a reservoir and pump assembly having an outlet for connection with the parts to be lubricated, the pump element comprising a cylinder having an inlet from said reservoir, a tight fitting piston in said cylinder, manual means for drawing said piston outward to charge the pump, spring means within said cylinder for automatically discharging said pump, said piston having an end structure normally urged by said spring to close said outlet to prevent draining of lubricant from the installation during the intervals between pump operations, said installation including an air separating cup subjected to pressure exerted by the pump,said cup having a valve at the upper part thereof, urged to its seat by virtue of the viscosity of lubricant urged therea'gainst by the pump, whereby any air will separate at, the top of the settling cup and will be vented past said v valve before the latter is closed in pump operation. D

46. A supply installation for a -chass1s lubricating system including a reservoir and pump assembly having an outlet leading to the parts to be lubricated, said installation including a pressure pump, means for intermittently operating the same, a valve seat near the bottom of said reservoir and a check valve of substantial area, normally retainedin open position below said seat and having substantially the entire area thereof below its outer periphery exposed to the flow of oil from therebelow, said valve having a part loosely correlated with respect to said seat for centering thereof when raised to- .ward said seat by the flow of oil during discharge of the pump, the gap between the valve and its seat being so large as to vent any air advanced by pump discharge.

47. In apparatus of the character described, the combination of a reservoir, a pump in communication with said reservoir, said pump having a tight piston, and a device including a valve responding automatically and selectively to the operation of the pump, to prevent the trapping or compression of any air below the valve, during pump' discharge, said apparatus having a discharge outlet which during the discharge stroke of the pump is in open communication with the delivery side of the pump piston for each of the limiting positions of the valve.

48. A supply installation for a chassis lubricating system including a reservoir and pump assembly having an outlet leading to the parts to be lubricated, a check valve normally displaced from its seat by a gap so large as not to obstruct inflow from the reservoir to the pump, said valve being constructed and arranged to impose resistance to the return flow of oil from the pump, such as to be carried to its seat and weighted so that the flow of a froth of oil and air will be inadequate to lift it, when the pump is discharged with a quick stroke.

49. A supply installation for achassis lubricating system including a reservoir and pump assembly having an outlet leading to the parts to be lubricated, a check valve normally displaced from its seat by a gap so large as not to obstruct inflow from the reservoir to the pump, said valve being constructed and arranged to be carried to its seat by the return flow of oil from the pump and weighted so that the flow of a froth of oil and air will be inadequate to lift it, said installation including a settling chamber below the check valve into which the pump discharges so that any air and froth advanced by the pump will first pass the valve, the pump jet being directed into said settling chamber in a path such as to avoid impinging thereof upon the valve.

50. A supply installation for 'a chassis lubricating system including a lubricant reservoir. a pump cylinder fixed in a corresponding socket in said reservoir and near the lower end thereof and extending laterally therefrom, a port from said reservoir into said socket for admission of lubricant to the pump cylinder, a port from said socket for exit of lubricant from the installation, a plunger rod in said pump cylinder, a cylindrical member at the inner end of said rod of diameter slightly smaller than the bore of the pump cylinder, having a fiat seating end, and a spring normally-urging said cylindrical member in one direction to prevent flow of lubricant both through said inlet and through said outlet port.

51. In a pump, the combination of :1 cylinder, a piston operating therein, a propulsive spring for discharging the cylinder, a member closing the inlet and the outlet of said pump and in advance of said piston and a spring weaker than said propulsive spring urging said member to close the inlet and the outlet of the pump.

Signed at New York city, in the county of New York and State of New York, this 25th day of August, D. 1926.

JOSEPH BIJUR. 

